Abstract: the frequent occurrence of earthquakes around the world has heightened the need for studying the seismic performance of existing structures according to code of practice. This concept has become an urgent issue in egypt especially after hitting a dramatic earthquake to cairo in 1992. The objective of this research is to assess the seismic performance of an existing shear wall residential building located in cairo. Both dynamic response spectrum (rs) and equivalent static force (esf) methods are used in the seismic analysis. The design rs curve suggested by the egyptian code (ec) for seismic design is utilized to perform the dynamic analysis. The response analysis of the building under the acting seismic loads has been performed using etabs, universal finite element analysis software for dynamic analysis. The entire work has been carried out in two stages in order to rescale the dynamic base shear. In the first stage, the built three dimensional building model has been subjected to the static and dynamic earthquake loading following egyptian code guidelines and hence the obtained static and dynamic base shear are compared. The second stage is concerned with scaling the obtained dynamic base shear and reloading the model as the first stage. The considered responses are expressed in terms of floor displacements, shear forces at each floor level, base shear and base moment. Moreover, results from numerical simulations, for storey torsional irregularity ratios are presented for the considered static and dynamic analysis methods. The results of the study show significant differences in building's responses obtained using esf and rs analysis methods. It has been found that the application of static method in a specified direction results in responses in the same direction. However, the applications of dynamic rs method induces response in both directions regardless the direction of loading.
Keywords: Equivalent static force, response spectrum, base shear, Egyptian code.
Title: Response Analysis of Multi-Storey RC Buildings under Equivalent Static and Dynamic Loads According to Egyptian Code,
Author: Sayed Mahmoud, Waleed Abdallah
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
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